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VPN Problem with IP Phone SPA525G to ASA5520 - using Asterisk/FreePBX



I am planning on using a number of these IP phones at users homes, from where they can connect over the VPN client built into the phone to the ASA 5520, then once connected to the network, they can be configured to work with Asterisk.

I have attained the licensing required on the ASA as you can see below;

Licensed features for this platform:

Maximum Physical Interfaces    : Unlimited

Maximum VLANs                  : 150     

Inside Hosts                   : Unlimited

Failover                       : Active/Active

VPN-DES                        : Enabled 

VPN-3DES-AES                   : Enabled 

Security Contexts              : 2       

GTP/GPRS                       : Disabled

SSL VPN Peers                  : 10      

Total VPN Peers                : 750     

Shared License                 : Disabled

AnyConnect for Mobile          : Disabled

AnyConnect for Cisco VPN Phone : Enabled 

AnyConnect Essentials          : Disabled

Advanced Endpoint Assessment   : Disabled

UC Phone Proxy Sessions        : 2       

Total UC Proxy Sessions        : 2       

Botnet Traffic Filter          : Disabled

The problem I am having, is when I try and connect to the VPN from one of the IP phones, using an Anyconnect SSL connection I have configured on the ASA, I get "Failed to obtain WebVPN cookie" and it does not connect. It looks line I have to install the correct certificate somewhere, however I cannot find any information about what to do.

I have already looked at this guide - but it does not really help as this only describes the process of sorting out the certificates with a CUCM, however I am using Asterisk as the call manager.

Can someone please explain what needs to be done to get this working? Is there a guide about for this?



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